🏷️ Basic Information Identification Make: Jaguar Model: 420 Model Code: XJ6 Series 1 (platform shared, visually distinct) Generation Production Years: 1966-1968 Codes Chassis Prefix: 420 👋 Introduction Market Position Segment: Luxury Saloon / Executive Car Competitive Analysis Key Competitors: Rover P5B, Rover P6, Mercedes-Benz W108/W109, BMW E3 Key Features Styling: Elegant 'Sovereign' styling, derived from the Jaguar XJ6 but with a more formal grille and quad headlights. Performance Credentials: Blend of Jaguar's performance heritage with increased luxury and comfort for the executive market. Target Audience Audience: Senior executives, discerning drivers seeking a balance of performance, luxury, and classic British style. 📋 Manual Details Coverage Areas Documentation Type: Service Repair Manual and Parts Catalogue Page Count Estimated Page Count: 300-400 pages (typical for combined manuals of this era) Manual Type Manual Format: Combined Service Manual and Parts List/Catalogue Language Language: English Format Format Type: Print Replica / PDF (digital versions are common for sales) 📖 Manual Coverage Systems Covered Powertrain: Engine (XK Series 4.2L I6), Fuel System, Ignition System, Cooling System, Exhaust System Transmission: Manual (Moss Gearbox), Automatic (BorgWarner Model 8) Chassis: Front Suspension (Double Wishbone, Coil Springs, Anti-Roll Bar), Rear Suspension (IRS - Independent Rear Suspension, Semi-Trailing Arms, Coil Springs), Steering System (Power Assisted Steering), Brakes (Dunlop Disc Brakes - Front and Rear) Electrical: Starting System, Charging System (Generator/Alternator), Lighting, Instrumentation, Wipers, Horn, Radio (Optional) Bodywork: Body Shell, Doors, Hood, Trunk Lid, Bumpers, Glass, Seats, Interior Trim Procedures Included Routine Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Lubrication Points, Air Filter Service Engine Repair: Engine Overhaul, Piston/Ring Replacement, Valve Grinding, Bearing Replacement, Timing Chain Service Transmission Repair: Manual Gearbox Overhaul, Automatic Transmission Service and Repair (adjustments, seal replacement) Brake System Repair: Brake Pad/Shoe Replacement, Disc/Drum Machining, Caliper Overhaul, Fluid Bleeding Electrical Troubleshooting: Wiring Diagrams, Component Testing, Fault Diagnosis Suspension And Steering Repair: Bushings, Ball Joints, Shock Absorber Replacement, Steering Rack/Box Service Fuel System Repair: Carburetor Overhaul (SU HS8/HD8), Fuel Pump Service, Fuel Line Replacement Ignition System Repair: Distributor Service, Coil Replacement, HT Lead Replacement Technical Depth Depth Level: Comprehensive (from basic maintenance to full engine and transmission rebuilds, with detailed part identification) Parts Catalogue Part Identification: Illustrated parts breakdown with part numbers for most components 📊 Manual Specifications File Format Digital Format: PDF (Searchable Text, High Resolution Images) Print Quality Print Quality: High-resolution scans suitable for professional printing Binding Type Binding Type: N/A (for digital format), Typically Spiral or Perfect Bound (for printed versions) Paper Type Paper Type: N/A (for digital format), Glossy/Matte Paper (for printed versions) ⚙️ Engine Specifications Primary Engine Engine Type: DOHC Inline 6-Cylinder (Jaguar XK Series) Displacement: 4.2 Liters (4235 cc) Bore X Stroke: 92.08 mm x 106.00 mm Compression Ratio: 8.0:1 or 8.5:1 (depending on market/spec) Performance Horsepower Bhp: Approx. 245 bhp @ 5500 rpm Torque Lb Ft: Approx. 283 lb-ft @ 3500 rpm Fuel System Carburetion: Twin SU HD8 or HS8 Constant Velocity Carburetors Fuel Type: Premium Unleaded Gasoline (Octane rating dependent on market, historically 95-98 RON) Cooling System Cooling Type: Water Cooled Oil System Oil Capacity Quarts: 7.5 US Quarts (with filter) 🔧 Transmission Standard Type: 3-Speed Automatic (BorgWarner Model 8) Optional Type: 4-Speed Manual (Moss Gearbox, with Overdrive on 4th gear) Features Automatic Features: Column or floor shift selection, smooth engagement. Manual Features: Synchromesh on all gears, overdrive for highway cruising. 📐 Dimensions Exterior Length Mm: 4905 mm (193.1 in) Width Mm: 1734 mm (68.3 in) Height Mm: 1372 mm (54.0 in) Wheelbase Mm: 2728 mm (107.4 in) Front Track Mm: 1359 mm (53.5 in) Rear Track Mm: 1334 mm (52.5 in) Weights Curb Weight Kg: Approx. 1600-1700 kg (3527-3748 lbs) Gross Vehicle Weight Kg: Approx. 2000 kg (4409 lbs) 🛡️ Safety Features Ratings Crash Test Era: Pre-modern crash testing standards; focus on structural integrity and passenger protection for the era. Active Features Braking System: Dunlop disc brakes on all four wheels, servo-assisted. Steering System: Power assisted recirculating ball steering. Passive Features Seatbelts: Front seatbelts standard, rear optional depending on market. Body Construction: Monocoque chassis construction providing good rigidity for its time. 💡 Technology Features Infotainment Audio System: Original Lucas or Motorola Radios (optional, often AM/FM) Driver Assistance Power Steering: Standard power-assisted steering for reduced driver effort. Connectivity N A: No modern electronic connectivity features typical of the era. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 miles or 6 months (typical for the era). Tune Up Interval: Every 6,000-12,000 miles (depending on specific items like ignition points, plugs). Fluid Specifications Engine Oil Viscosity: SAE 20W/50 or 10W/30 (depending on climate, consult manual for precise recommendation). Coolant Type: Ethylene Glycol based antifreeze mixture (50/50 with water). Brake Fluid Type: DOT 3 or DOT 4 Hydraulic Brake Fluid (check manual for exact specification). Transmission Fluid Auto: Dexron-III (or equivalent for BorgWarner Model 8). Transmission Fluid Manual: EP 90 Gear Oil. 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